CYPERACEAE 157 



24. C. ovularis (Michx.) Torr. In dry fields and on hills: southern 



N. Y. to Fla., west to 111., Kan. and Tex. 



N. Y. Rare and local in Westchester Co. and the Bronx, increasing 



southward but not definitely known from L. I. 

 N. J. Common throughout the coastal plain except the pine- 

 barrens, there and elsewhere not recorded. 

 Pa. Bucks Co. 



Tertiary, wanting on Beacon Hill, common elsewhere: Creta- 

 ceous, common: Older Formations, rare and local. 176-220 days. 

 About sea level. 



25. C. filiculmis Vahl. (C. filicidmis macilentus Fernald). In dry 



fields and on hills: Me. to Ont., Minn., Fla., Kan., Tex. and 

 Mex. 



Throughout the range except in the pine-barrens, there not 

 recorded; more common northward and less common southward 

 than elsewhere, but common on L. I. 



26. C. cayennensis (Lam.) Britton. In waste grounds: N. J., 



Pa. and in the southern states. Native of Tropical America. 

 Known only as a weed near Camden, N. J. 



27. C. Grayi Torr. In sands of the sea shore and in pine-barrens: 



N. H. to Fla. 



Conn. Along the coast, decreasing and perhaps wanting inland. 



N. Y. Coasts of L. I. and S. I. and locally on s^nd in the interior 



of L. I. 

 N. J. Rare in Monmouth and Middlesex counties, increasing and 



common southward, especially in the pine-barrens. 



Tertiary, common: Cretaceous, less common: Older Formations, 

 confined to sea-beaches or near them. 176-220 days. About sea 

 level. 



28. C. globulosus Aubl. In dry soil, or a weed: Va. to Fla., west 



to Mo. and Tex. Also in Bermuda and Trop. Am. 

 Pa. A rare weed near Philadelphia. 



2. Eleocharis R. Br. 



Spikclet scarcely or not at all thicker than the culm; scales cori- 

 aceous. 

 Culm stout, spike many-flowered. 



Culm terete, nodose. 1. E. inter stincta. 



Culm 3- or 4-angled, continuous. 2. E. mulata. 



Culm slender, triangular, continuous; spikelet few-flowered. 3. E. Robbinsii. 



